Calculating-machine.



S. E. CARLIN.

CALCULATING MACHINE.

APPLICATION fuso sPT.s.191o.

Patented Dec.12,1916,

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S. E. CARLIN.`

CALCULATING MACHINE. ,APPLICATION FILED SEPT. 6. 1910.

Patented Dec. 12, 1916.

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S. E. CARLIN.

CALCULVATING MACHINE. APPLICATION FILED SEPT. s. 1910.

Patented Dec. 12, 1916.

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CALCULATING MACHINE.

APfLlcAnon min SEPT. 6. 19m.

Patented Dec. 12, 1916.

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S. E. CARLIN.

CALCULATING MACHINE.

. APPLICATION FILED SEPT. 6, I9IQ. 1,208,287, y Patented 1160.121916.

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CALCULATING MACHINE. APPLICATION man SEPT. 6. |910.

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S. E. CARLIN.

CALCULAIING MACHINE. APPucATlon FILEDKs'EPT. s. 19m.

Patented Dec.v l2, 1916.

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Patented Dec. 12 1916.'

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CALCULATING MACHINE.

APPucmoN mio SEPT. 6, 1910.

1,208,287. Patented 1166.121916.

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S. E. CARLIN.

CALCULATING MACHINE.

APPLICATION FILED SEPT. 6. 1910.

Patented Dee. 12, 1916.

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CALCULATING MACHINE. APPLICATION FILED SEPT. 6, 1910.

Patented Dee. 12, 1916.

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s. E. CARLIN.

CALCULATING MACHINE.

APPLICATION FILED SEPT-6.19m.

Patented Dec. 12, 1916.

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S. E. CARLIN.

CALCULATING M'ACHINE.

APPLICATION man SEPT. 6. 1910.

Patented Dec. 12, 1916.

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S. E. CAHLlN.

CALCUL/WING MACHINE.

APPLICATION FILED SEPT- 6. l9l0.

Patented Dec. 12, 1916.

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SAMUEL E. CARLIN, OF CHICAGO, ILLINOIS, ASSIGNOR TO CARLIN CALCULATOR COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

CALCULATING-MACHINE.

Specicaton of Letters Patent.

Patented Dec. 12, 1916.

Application led September 6, 1910. Serial No. 580,659.

To all whom t may concern Be it known that I, SAMUEL E. CARLIN, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Calculating-Machines, of which the following is a specification.

This invention relates to calculating machines of the non-listing, single totalizer type, wherein the totalizer operates subtractively and addingly and is therefore algebraic in its operation, and consists in substantially the construction hereinafter to be described, illustrated in the drawings, and particularly pointed out in the claims.

It is also an object of this invention to improve and refine a machine of this character, with a view of simplifying the elements, increasing the efficiency, and decreasing the cost of manufacture.

Vith the above and other objects in view, as will be hereinafter apparent, this invention consists in the construction, combination, and arrangement of parts, all as hereinafter more fully described, claimed and illustrated inA the accompanying drawings, wherein:

Figure 1 is a plan view, partly in section, of a machine constructed in accordance with the present invention. Fig. 2 is a longitudinal vertical section of the machine, taken along the line 2 2 of Fig. 1 and illustrates the totalizer, power and drive shafts, the selective slides for the f determination of the varied movement imparted to the totalizer, and the locks for said selected slides. Fig. 2"L is a vertical section taken along the line 2a a of Fig. 2 and shows, in elevation, one of the totalizer gears. Fig. 3 is a longitudinal section taken along the line 3 3 of Fig. 1 to illustrate the controls of the machine, such as the repeat and repeat release keys, the error key, the motor bar, and their associated clutches and elements. Fig. 4 is a horizontal section taken alongy the line 4 4 of Fig. 2, and illustrates the transmission gearing for imparting a rotary movement to the totalizer power shafts; also, the 'mechanism for returning the selective slides to their inactive positions, either automatically or by the error key. Fig. 5 is a plan view of the totalizer,

the mechanism-for controlling its directiony of rotation, and thetotalizer -drive and.

power shafts, the same being a section taken along the line 5 5 of Fig. 2. Fig. 6 is a transverse vertical section taken along the line 6 6 of Fig. 2 to illustrate the locks of the selective slides and the mechanism for returning said slides to their inactive positions either automatically or by the error key. Fig. 7 is a similar vertical section taken along the line 7 7 of Fig. 2, and illustrates in detail the coperation between the totalizer power and totalizer drive shafts, whereby a varied movement is imparted to the totalizer shafts, and also the error key clutch, and the repeat key. Fig. 8 is a similar view along the line 8 8 of Fig. 2 and illustrates thelocks for the totalizer drive shafts, the coperation of the gearsN mounted on said drive shafts and adjusted by the selective slides, with the mutilated gears of the totalizer power shafts, and the motor bar clutch. Fig. 9 is a vertical section taken along the line 9 9 of Fig. 2, to illustrate the carrying gears of the totalizer and the clutch for the correction of the units error which occurs in an algebraic totalizer. Fig. 10 is also a vertical section taken along the line 10 1O of Fig. 2 and illustrates tbs dogs for setting the carrying gears, means for operating said dogs, and the shaft for returning said carrying gears to their normal and inactive positions. Fig. 11 is a vertical section taken along the line 11 11 of Fig. 2 to illustrate a fragment of the totalizer shift whereby the direction of rotation of said totalizer is changed. Fig. 12 is a perspective view of one of the dogs for controlling and setting the carrying gears. Fig. 13 is a view illustrating the coperation between the selective slides and the keys, and also the'shafts for operating the selective slide locks, and the cooperation of said shafts with said keys, the same being a horizontal section taken along the line 13 13 of Fig. 6. Fig. 14 is a side elevation of the control for the totalizer shift illustrated in Fig. 11, 'and the lock for coperating therewith, and is a section taken along the line 14- 14 of Figs. 4 and 5. Fig. 15 is a vertical section taken along the line 15 15 of Fig. 14, and illustrates a lock for the control of the totalizer shift whereby the direction of rotation of the totalizer cannot be changed during the operation of the machine. Fig. 16 is a vertical transverse section taken along the line 16-16 of Fig. 4, showing the lock for the motor bar and the error key whereby one is locked against movement during the operation of the other, and vice versa. Fig. 17 is a perspective view of the bell crank lever or dog which retains the shutter of the totalizer in its adjusted position and operates the mechanism for the correction of the units error. Fig. 18 is a similar view of the vlock for the control of the totalizer shift. Fig. 19 is a plan view of the shiftable shutter of the totalizer and the mechanism controlled by the movement thereof, for the correction of the units error. Fig. 2O is a vert-ical section taken along the line 20-20 of Fig. 2, and illustrates the means whereby the shutter is shifted by the passage of the number bearing member of the highest denominational order through zero in either direction. Fig. 21 is a plan view of the cams through the medium of which the selective slides are returned to their normally inactive positions automatically at the end of the calculation, or by the operation of the error key, in which event no calculation occurs. Fig. 22 is a perspective view of the slide coperating with the repeat and repeat release keys whereby the mechanism for the correction of a units error is made inactive during repeated addition or subtraction, and the mechanism for returning the selective slides to their normal or inactive positions is also rendered inH operative.` Fig. 23 is an elevation partly in section of the dog and cam coperating with the power shaft of the machine whereby the rock shaft operated by the motor bar is locked from movement during calculation. F 24 is a similar view illustrating a lock for rendering the error key ineffective. Fig. 25 is an elevation of the cam and arm whereby the carrying gear of the units order is released for the correction of the units. Fig. 26 is a perspective view of one of the yokes coperating with each selective lslide whereby the same are returned to their normal and inactive positions. Fig. 27 is a perspective view of one of said selective slides. Fig. 2S is a perspective view of said yoke controlled by the error key. Fig. 29 is a horizontal section taken along the line 29*29 in Fig. 10, and illustrates the arrangement of the carrying gears of the totalizer and the controlling dogs coperating therewith. Fig. 30 is an elevation partly in section of one of the denominational keys. Fig. 31 is a detailed perspective view of the stem of the error key. Fig. 32 is a perspective view of the bell crank operated by the repeat and repeat release keys.

Referring more particularly to the drawings and in the present exemplification of the invention, the numeral 35 designates a base upon which is mounted spaced upright supports 36, 37 and 38, which latter may be connected or fastened together in any desired or suitable manner, preferably by means of tie rods or bolts 39 (shown more clearly in Figs. 4 and 5), and these supports form bearings for the various shafts. A support 40 is provided, which is arranged preferably adjacent the front of the machine, as shown in Figs. 2 and 3, and this support serves as a means for supporting the keys 41, which will be hereinafter described.

.lournaled in the supports 36, 37 and 3S are a plurality of power shafts 42 (see Figs. 2 and 5), preferably nine in number, and one for each of the operating shafts 43. These latter shafts are also journaled in suitable bearings, preferably in the supports 36, 37 and 3S, and are arranged in a plane above the shafts 42. One of these power and operating shafts 42, 43, is provided for each of the number bearing members 44 of the totalizers. Motion may be imparted to the shafts 42 in any desired or suitable manner but preferably by means of a shaft 45 journaled in suitable bearings 4G, so as to extend transversely acrossone end of the shafts 42, and this shaft 45 is provided with a plurality of bevel gears 47, which respectively mesh with similar gears 48 on the adjacent ends of the shafts 42, and through the medium of which meshing gears, the shafts 42 will be rotated, preferably in a manner which will now be described.

Y A shaft 49, which for the sake of convenience, will hereinafter be designated as a running shaft, is provided for imparting motion to the shaft 45, and this running shaft 49 derives its motion from a motor 50 (see Figs. 1, 4 and 5) on the axle 51 of which motor is provided a worm gear 52. The shaft 49 is journaled in suitable bearings,

preferably in the supports 3G, 37 and 3S, so

as to extend longitudinally of the machine transversely with respect to the shaft 45 and parallel with the shafts 42. On the end of the running shaft is provided a gear 53 with which the worm gear 52 meshes, and a gear 54 (see Figs. 5, 7 and 8), which latter is mounted loosely on the shaft. Secured to and for rotation with the gear and also loosely mounted on the shaft 49 is a disk 55 which is provided with a notch 56 in its periphery, into which notch a portion of a dog 57 projects to lock the gear 54 and the disk against overthrow. An elastic member 58 in the form of a spring is provided which tends normally to project the portion of the dog 57 into the notch 56. Secured to and for rotation with the shaft 49 and adjacent the disk 55 is a star toothed wheel 59 and a dog 60 is pivotally supported by the disk 55 for locking the disk 55 and the gear 54 to the shaft 49 for rotation therewith. An elastic member 61 controls the dog 60 and tends normally to move the latter in a direction to lock the disk and Wheel to the shaft. The gear 54 is provided for the purpose of communicating motion from the shaft 49 to the shafts 42, and this is accomplished through the medium of a shaft 62 (see Figs. 4, 5, G, 7 and 8), on which shaft 62 is keyed a gear G3. This gear 63 meshes with the gear' 54 so that when the shaft 49 is rotated and the gear 54 locked thereto, the shaft 62 will be rotated by the gear G3, and this motion of the shaftl 53 will be imparted to the shaft 45 through the medium of meshing gears 64, G5, secured respectively to the shafts 62, 45 (as shoivn more clearly in Figs. 4 and 6). It Will thus be seen that when the dog 60 locks the gear 54 to the shaft 49, the motion of the shaft 49 Will be imparted to the shafts 42.

In order t0 permit the shafts 42 to make one complete revolution and then stop, meehanism must be provided for unlocking the gear 54 from the shaft 49 at the proper time. .Any suitable means may be provided for this purpose but a simple and efficient means for accomplishing this result comprises a dog 6G which is adapted to engage a shoulder 67 on the dog 60 to move the latter out of engagevment with the star or toothed Wheel 59 vand against the tension of the elastic member 60.

This dog- 66 is adapted to be operated to reAv lease the dog 60 to lock the gear 54 to the shaft 49 in a manner which Will be hereinafter described.

The number bearing members or Wheels 44 of the totalizer are each provided in the present exemplification with tvvo series of numbers 68, 69, which progress from zero to 9, and the numbers of the two series are so arranged With respect to each other that they will progress successively in opposite directions and so that the sum of the respective adjacent numbers of the series When added together will make nine. One of these series of numbers may be differentiated from the other series in any suitable manner, such as by means of different colors. These number bearing members are adapted to be controlled by the keys 41, of which there are provided nine keys for each numberbearing member, and the keys are adapted to control the mechanism whereby a variable movement may be imparted to each of the respective number bearing members according to which of the keys is actuated. In order to accomplish this variable movement of the number bearing members, there is provided a plurality of mutilated gears 70 on each of the shafts 42. These gears are preferably nine in number and are secured together in any desired or suitable manner, the series of gears on the shafts 42 being preferably arranged in staggered relation to each other and each series is provided respectively With a different number of teeth from 1 to 9 and arranged so that the number of teeth Will progress successively from one end to the other end of the respective series. A traveling gear 71 is mounted upon each of the shafts 43 and secured for rotation with respect to shafts 43 and for adjustment longitudinally on the shafts in any ordinary and well known manner, each of the gears 71 being arranged upon the shafts in the same relative position as the gears 7G on the shafts 42. These gears 71 are adapted to be moved for any desired distance on the respective shafts so as to be positioned with respect to the gears 70 to engage the latter Ywhen the shafts 42 are rotated, and thereby impart a degree of rotation to the shafts 43 corresponding to the number of teeth on the respective gears 79 with which the traveling operating gears 71 mesh. This variable motion of the shaft 43 is imparted to the number bearing members 44 of the totalizer through the medium of connecting gears, comprising spaced gears 72, 73, secured to the shafts 43, and corresponding to gears 74, 75, mounted loosely upon shafts 7G to which the number bearing members 44 of the totalizer are secured. One of these gears 72, 73, is adapted to rotate the shafts 7 6 and consequently the respective number bearing member 44 in one direction, While the other of the gears 72, 73, is adapted to rotate the shafts 7 6 and the number bearing member 44 in the opposite direction. In order to accomplish these different directions of rotation, one of the gears, preferably the gear 7 2, meshes directly with the gear 74, While the gear 73 imparts its motion to the gear 7 5, through the medium of an intermediate gear 77 (see Figs. 2 and 5).

'In order to lock the gears 74, 75, to the shaft 7 6, a sleeve. or collar 78 is provided, which is secured to the shaft 7 G for rotation therewith and for longitudinal adjustment thereon. Each of the collars 78 is of a length slightly less than the length of the space between the gears 74, 75, and is provided With projections 79, 80, extending from the extremities thereof, which projections are adapted to enter apertures S1, provided in the gears 74, 75, and the projections are of such a length that When the collars 7 8 are shifted to lock one of the gears 74, 75, for rotation with the shaft76, the projections on the other end of the sleeve or collar will move out of the apertures in the other of the gears 74, 75 to release the latter. The direction of rotation of the number bearing members 44 is, therefore, controlledby the sleeve or collar 78, and this sleeve or collar may be shifted longitudinally on the shaft 76 in any suitable manner, preferably by means of a pivotally supported toothed member 82 (shown more clearly in Figs. 2, 5 and 11), the teeth of which member mesh With circumferential flanges 83 on the collar 78. It will therefore be seen when the member S2 is rocked, the collar will be correspondingly shifted.

Suitable mechanism is provided for shifting the machine so as to perform addition or subtraction or to cause the machine to indicate debits and credits, and preferably compresses tivo keys 84, 85 (shown more clearly in Figs. 1,' 5, 6, 13 and 14), Which are designated respectively as debit and credit keys. These keys are arranged in a convenient position for the `operator and are connected in such a manner that when one of them is actuated or depressed the other Will be released or returned. In order to accomplish this, an oscillating member 86, is provided Which is pivotally supported as at 87. To one extremity of the member S6 is pivotally connected as at 88 the stem of the key S4, While the stem of the key S5 is pivotally connected as at S9, to the other extremity of the member and on the opposite side of the pivot 87. This member 86 is provided with an arm 90 to the free extremity of 1which is pivotally connected the slide bar or member 91. The other extremity of this bar or member 91 is connected as at 92 to a disk or crank 93, secured to the axle 94 of the toothed member or segment 82 (see particularly Figs. 5 and 14). rlhus it will be seen that when the member SG is rocked in one direction by one of the keys S4, 35, the other key will be elevated, While at the same time the bar or slide 91 will rock the toothed member or segment S2 in one direction or the other through the medium of the crank or disk 93. In order to retain the toothed member or segment 82 and Consequently the sleeves or collars 78 in their adjusted positions, the crank or disk 93 is provided ivith spaced notches 95, 96, and a dog 97, controlled by elastic members or springs 98, is provided, which is adapted to enter the notches 95, 96 respectively, after the toothed member o1 segment has been adjusted. rIhe tension of the elastic members 98 is such that the dog Will be held against accidental displacement, but Will yield when pressure is exerted upon the cam or disk 93 by the actuation of either of the keys 84, S5.

As has been before stated, the degree of rotation of the'numbcr bearing members 44 is controlled by the actuation of the keys 41, which latter are adapted to control this rotation by the degree of adjustment of the gears 71 ivith respect to the gears 70. The selecting mechanism vrhereby this adjustment of the gears 71 is accomplished Will novv be described.

A selecting member or slide 99 (see particularly Figs. 2, 7, 13, Q7) is provided, one for each of the gears. As the construction and operation of each of the selecting mechanisms are the same, the description of one will apply to them all. The selecting member or slide 99 is provided with an elongated slot 100, extending longitudinally thereof, and for substantially the entire length thereof. Recesses 101 are provided in the member which open through the edges of the slot 100 to communication with the slot, and are arranged on each side of the slot in staggered relation with respect to each other. A plurality of depending pins or projections 10:2 are provided on the member 99 Which project below the lower face thereof and in advance of each of the recesses 101, and serve as means for arresting the movement of the member 99 in a manner which will be presently set forth.

A depending arm or projection 103 is provided on the member 99, which extends through a slot 104 in the support 40 and is connected with the respective gear 71 on the shaft 43 by means of a lateral projection 105, extending into a circumferential groove 106 in the hub of the gear 71. Each of the keys 41 (see particularly Figs. 9, 13 and 30) is provided With a lateral projection 107 on the stem thereof and these stems project through the slot 100 and also through the support 40. A casing or housing 108 is removably supported by the support 40, beneath each of the keys 41 in such a manner that a. head 109 on the stem Will enter the housing, and an elastic member 110 is provided Within the housing which tends normally to elevate the keys 41. The slide 99 is adapted to be held normally in a position so that one recess 101 Will stand beneath each of the pins or projections 107 on each of the series of keys 41, so that when any one of the keys of the series is depressed, the pin or projection 107 will pass through the respective recesses 101 and beneath the number or slide 99 to a position Within the path of movement of one of the depending pins or projections 102. In order to move the slide or member 99 to this position, there is provided a member 111 (see Figs. 2 and 26) Which is pivotally supported in any suitable manner, preferably on arock sha-ft 112, journaled in suitable supports (see particularly Figs. 2 and 4). This member 111 is preferably in the form of a yoke, as shovvn, and is provided with an arm or extension 113, having a bifurcated extremity 114, and is of such a length that a laterally projecting pin or lug 115 (see Figs. Q and 27) on the slide 99 will enter the bifurcation. It will therefore be seen that when the member 111 is rocked about its point of pivotal support, the slide 99 will be correspondingly moved.

The slide 99 is normally held in a position to cause the gearl 71 to be moved out of mesh with the ygear 70, and in order that the selecting mechanism may quickly adjust the gear 71 into the proper position With relation to the gears 70, an elastic member 116 is provided which tends normally to move the slide 99 to shift the gear 71 and tocause one of the pins or projections 102 thereon to engage with a pin or projection 107 on the actuated key 41. This elastic member 116 is secured by one extremity preferably to the arm 113 ofthe member 111 and is anchored by its other extremity to a fixed support. When the slide 99 is adjusted to a position that the recesses 101 Will stand beneath the pins or projections 107, a tension is created upon the elastic member .116 and the slide may be locked in this position by means of an arm 117 (see particularly Figs. 2 and 13) which is secured to a rock shaft 118, journaled in suitable bearings 119, adjacent and above the slide 99, so as to extend longitudinally thereof and transversely with respect to the stems of the keys 41. An elastic member 120 is provided Which tends normally to rock the shaft 118 in a direction to project the arm 117 in the path of movement of one extremity of the slide 99 when the latter is acted upon by the tension of the elastic member 116. In order, therefore, to release the slide 119 to permit the elastic member 116 to adjust the slide and position the gear 71 With respect to the gear by the actuation of the keys 41, it is necessary to first rock the shaft 118 to move the arm 117 and thereby release the slide. This movement of the shaft 118 may be accomplished by means of another lateral projection or pin 121 (see also Fig. 30) on the stems of the keys 41, cach of which projections 121 is adapted to engage an arm or projection 122 on the shaft 118 and the arms or projections 122, and pins or projections 121 are so arranged With respect to the pins or projections 107 of the key stems that the shaft 118 will be rocked just about the time the pins or projections V107 reach the limit of their movement through the recesses 101 in the slide 99. When the arm 117 is moved to release the slide 99, the elastic member 116 will exert its tension on the member 111 through the medium of the arm 113 to automatically and quickly adjust the slide 99 until the depending pin or projection 102, just in advance of the pin or projection 107 on the stem of the key 41, which has been actuated, Will engage such pin or projection 107 to arrest the movement of the slide, at which time the gear 71 Will be properly positioned With respect to the gears70 to impart a number of steps of rotation to the number bearing members 44 through the medium of the intermediate connections already described,

corresponding to the number indicated lby the actuated key. After the desired number of gears 71 have thus been set, it Will be apparent that when the connection already described between the running shaft 49 and the shaft 62 has been established, motion Will be imparted to all of the various shafts and the respective number bearing members 44 will be correspondingly rotated. In order to establish this connection a controller key 123 is provided (see particularly Figs. 1, 3, 6 and 7), which is arranged in a convenient position for the operator. This controller key 123 is adapted to impart motion to a rock shaft 124 (see also Figs. 4 and 5), ournaled in suitable supports and is connected to the rock shaft by means of suitable stems 125, which latter are connected to arms 126 en the rock shaft. In order that the con* troller key 123 may be conveniently arranged for the operator When actuating any of the keys of any of the series, it is arranged to extend substantially the entire length of the series, as shown more clearly in Fig. 1. The

rock shaft 124 forms a support for the dog `60 to move the latter about its point of pivotal support, and thereby release the gear 54 and the disk 55 with respect to the shaft 49. After the selecting mechanisms have been set in the manner already described, the controller key 123 may be actuated to shift the dog 66 and release the dog 60 so that motion will be imparted to the number bearing members 44.

In order to prevent injury to the machine which might be Caused by the actuation of one of the keys 41, after the controller 123 has been actuated to set the mechanism in motion and before the completion of a complete cycle of movement of the parts it is desirable to lock all of the keys 41 which have not been actuated against actuation, it being, of course, understood that the actuated keys and all of the keys of the respective series in which one of the actuated keys is arranged are locked against actuation by the shifting of the respective slides or members 99. This locking mechanism, which will now be described, is designed for the purpose of locking the keys of the series Which have not been used and to prevent actuation of the keys of these series which actuation would tend to adjust the respective gears 70 and thereby cause considerable damage such as by the stripping of the teeth of the gears.

A member 129 (see particularly Figs. 2, 6 and 13) is mounted for a sliding movement upon a suitable support, preferably the support 40 adjacent and across the front edge thereof and is held in position preferably by means of fastening devices 130, such as bolts, screws or the like, which pass through slots 131 in the member and into the support. This member 129 is of a length to extend transversely across the front ends of the shafts 118, and is provided with a plurality of spaced laterally projecting portions 132. One of these laterally projecting portions is provided for each of the shafts 118. lThese projecting portions 132 are of a length to extend beneath the free extremities of the arms or projections 117 on the shafts, and an elastic member 133 (shown more clearly in Fig. 6) is provided, one end of which is secured to the member 129 and the other end is anchored to a suitable fixed support and tends normally to adjust the member 129 so as to move the laterally projecting portions 132 from beneath the respective arms or projections 117. )Vlien the member 129 is in this position, as shown more clearly in Figs. 6 and 13, the arms or projections 117 will be free from the laterally projecting portions 132, and any of the keys i1 may then be actuated to rock the respective shafts 118 as the arms or projections 117 on the actuated shafts 118 will project into the space between adjacent laterally projecting portions 132.

1n order, therefore, to lock against actuation the keys 41 which have not been actuated by the actuation of the space bar or key 123, a suitable connection should be provided between the member 129 and the controller or key, and suoli a connection will now be described.

Pivot-ally mounted upon a suitable support, preferably a depending arm or proj ection 134 on the support 40, is a bell crank lever, designated generally by the numeral 135 in Fig. 6. One arm 136 of this bell crank lever is provided with a bifurcated extremity 137 into which a laterally projecting lug or pin 138 on the member 129 projects. rllhe other arm 139 of the bell crank lever is also provided with a bifurcated extremity 140 to receive a pin or projection 141 on an arm or crank 142, which latter is secured to the rock shaft 124, so that when the shaft 124 is rocked by the actuation of the controller or key 123 in the manner already described, the arm 142 will rock the bell crank lever 135 to shift the member 129 against the tension of the elastic member 133 to move the laterally projecting portions 132 beneath the arms or projections 117 on the shafts 118, which latter have not been actuated, and thereby lock those shafts, and consequently the keys 41 against actuation. )Vlien the controller key 123 is returned to its normal position, the shaft 124 will be rocked in the opposite direction by the elastic member 127 (see Figs. 4 and 6), and at the same time the elastic member 133 will shift the member 129 into a position so as to cause the spaces between the laterally projecting portions 132 to move into positions to receive the arms or projections 117 on the shaft 118.

This locking of the keys 41 should be accomplished before the clutch or coupling mechanism between the running shaft 49 and the shaft 62 is rendered active, and in order to accomplish this, mechanism should be provided whereby the member 129 will Ybe adjusted to its locking position, slightly in advance of the releasing or rendering active of the clutch or coupling mechanism just referred to. As both of these parts are ,actuated by the same rock shaft 124 and the controller or key 123, suitable mechanism for accomplishing this result comprises a loose connection between the rock shaft and the dog 66, and will now be described, reference being had particularly to Figs. 3, 5, 7 and 8.

The dog 66 is mounted loosely upon the shaft 124 and is provided with an arm 143 projecting from which is a laterally extending pin or lug 144, which projects into an elongated slot 145 in an arm or extension 145a extending from the shaft 124 loosely therein. This slot 145 is so disposed with respect to the pin or projection 144 that when the dog 60 is in operating position to lock the gear 50 to the shaft 49, one end thereof will be spaced from the pin or projection 144, so that during the first portion of the movement of the rock shaft 124, under the influence of the operation of the controller or key 123, the rock shaft will operate through the intermediate connec tions the member 129 to shift the latter to a locking position. About the time this member 129 has assumed this locking position and during the remaining portion of the operation of the rock shaft by the controller or key 123, the end of the slot 145 in the arm 1452L will be moved into engagement with the pin or projection 144 on the dog 66 to rock the latter and thereby re` lease the doo` 60. In order to hold the locking member 129 in an actuating or locking position during the time of calculation and before carrying, a locking mechanism is provided, preferably in the form of a cam 147, on theshaft 49 (see particularly Figs. 3, 8 and 23), which coperate respectively with an arm 149 secured to the rock shaft 124, and this cam andarm are so arranged with relation to each other that when the controller or key 123 is actuated and the locking member 129 shifted, the high portions -of the cam will cooperate with the extremi ties of the arm to lock the member against return during calculation, but allows it to return as soon as the carrying commences. After the completion of a calculation, it is necessary to restore the actuated keys 41 and the gears 71 to their normal or inoperative positions, so that another amount may beA 

